AMC5 SPA.LVO.100 Low visibility operations    

CAA ORS9 Decision No. 47

Text in magenta in force from 30 October 2025

CAT III OPERATIONS

The following provisions should apply to CAT III operations:

(a) Where the DH and RVR do not fall within the same category, the RVR should determine in which category the operation is to be considered.

(b) For operations in which a DH is used, the DH should not be lower than:

    (1) the minimum DH specified in the AFM, if stated;

    (2) the minimum height to which the precision approach aid can be used without the specified visual reference; or

    (3) the DH to which the flight crew is qualified to operate.

(c) Operations with no DH should only be conducted if:

    (1) the operation with no DH is specified in the AFM;

    (2) the approach aid and the aerodrome facilities can support operations with no DH; and

    (3) the flight crew is qualified to operate with no DH.

(d) The lowest RVR minima to be used are specified in Table 5.

 

Table 5: CAT III operations minima

RVR vs. DH and rollout control/guidance system

CAT

DH (ft) *

Rollout control/guidance system

RVR (m)

IIIA

Less than 100

Not required

200

IIIB

Less than 100

Fail-passive

150**

IIIB

Less than 50

Fail-passive

125

IIIB

Less than 50 or no DH

Fail-operational***

75

*:    Flight control system redundancy is determined under CS-AWO by the minimum certified DH.

**:    For aeroplanes certified in accordance with CS-AWO 321(b)(3) or equivalent.

***:    The fail-operational system referred to may consist of a fail-operational hybrid system.

The title and text below will replace the title and text above on 30 October 2025:

AMC2 SPA.LVO.100(b) Low-visibility operations and operations with operational credits

INSTRUMENT APPROACH OPERATIONS IN LOW-VISIBILITY CONDITIONS — CAT III OPERATIONS

For CAT III operations, the following should apply:

  1. For operations in which a DH is used, the DH should be determined by the use of a radio altimeter or other device capable of providing equivalent performance and be not lower than:

    1. the minimum DH specified in the AFM, if stated; or

    2. the DH to which the flight crew is qualified to operate.

  2. Operations with no DH should only be conducted if:

    1. operation with no DH is specified in the AFM;

    2. there is no published information indicating that the approach aid or aerodrome facilities cannot support operations with no DH; and

    3. the flight crew is qualified to operate with no DH.

  3. The lowest RVR to be used should be determined in accordance with Table 5.

Table 5: CAT III operation minima: RVR (m) versus DH (ft)

DH (ft) Ground roll-out control / Ground roll-out guidance system RVR (m)*
50-99 Not required 175
0-49 or no DH Fail-passive 125
0-49 or no DH Fail-operational 75

* Note: For a fail-passive or HUD roll-out control system, a lower RVR value (no lower than 75 m) can be used if stated in the AFM provided that the equipment demonstrated such capability as part of the certification process. This is provided that the operator has implemented the appropriate operating procedures and training.